XXxiv PROCEEDINGS OE THE ROYAL HORTICULTURAL SOCIETY. 



to be a variable one, and the form figured in the "Botanical Magazine," 

 t. 5645, not to be the one most commonly met with. 



Notonia Grantii. — This interesting Composite with bright-red heads 

 of flowers and Kalanchoe-like in habit, about 3 feet in height, a native of 

 Uganda, was exhibited by Messrs. J. Veitch. It was recommended that 

 a Botanical Certificate be awarded to it. It is figured in the " Botanical 

 Magazine," t. 7691. (Fig. 18.) 



Scientific Committee, February 23, 1909. 



Mr. E. A. Bowles, M.A., F.L.S., F.E.S., in the Chair, and eighteen 

 members present. 



Diseased Parsnips. — A report was received from Mr. Giissow con- 

 cerning the Parsnips with scabby spots from Mr. Gregory. They were 

 attacked by the fungus Plasmopara nivea, which appears first on the 

 leaves. This fungus also attacks Carrots and Parsley. 



Malformations in Orchids. — Mr. Gurney Wilson, F.L.S., sent the 

 apical portion of a pseudo-bulb of Dcndrobium nob He bearing a shoot 

 from which roots had grown as in a vegetative shoot, and a flower, the 

 lateral petals of which were coloured like the labellum. He also sent a 

 dimerous flower of D. nobile with the lip suppressed and the two lateral 

 sepals coherent. A Cypripedium from Sir Jeremiah Colman having two 

 dorsal sepals was also shown. 



Mendelism in Orchids. — Mr. Bolfe, A.L.S., showed flowers the result 

 of crossing Epidendrum evectum and E. xanthinum. The former of 

 these is purplish in colour, the latter yellow. The first cross gives 

 E. x keicense, and flowers of this hybrid were shown. Seedlings had 

 been raised from E. x keivense after self-fertilization, and of these, one 

 which flowered earlier was practically a reproduction of E. x keicense, 

 while of two others (flowers of which were shown) one showed partial 

 reversion towards the purple E. evectum, the other toward the yellow 

 E. xanthinum. He also showed the result of re-crossing E. x keivense 

 with the original parent E. evectum, the resulting plant having a purple 

 flower not quite so dark as the parent. Mr. Rolfe said that E. x keicense 

 re-crossed with E. xanthinum gave a yellow flower. Other plants of the 

 crosses had not yet flowered. 



Colour changes in Carrots. — Dr. Plowright sent the following note 

 concerning the colour changes occurring in Carrots, together with illus- 

 trative specimens. The portion of a Carrot sent is interesting as showing 

 the condition common last year, viz. the longitudinal splitting of the 

 root from the crown downwards, exposing the medullary portion, which 

 shows no tendency to cleave. The exposed portion shows a tendency to 

 development of chlorophyll. On the edges of the cortical portion no 

 chlorophyll is seen, but minute specks, tending to become confluent, of a 

 red colouring matter (carotin) have been freely developed. The specimen 

 sent is of an ordinary garden Carrot ; the Assuring of the outer portion 

 is thought to be due to dryness at the time of growth. In the smaller 

 specimen different colour changes have taken place. The exterior has 

 freely developed a green tint mottled with patches of purple. The roots 



